diff --git a/internal/glance/diagnose.go b/internal/glance/diagnose.go
index 0f76263..7978699 100644
--- a/internal/glance/diagnose.go
+++ b/internal/glance/diagnose.go
@@ -12,7 +12,7 @@ import (
 	"time"
 )
 
-const httpTestRequestTimeout = 10 * time.Second
+const httpTestRequestTimeout = 15 * time.Second
 
 var diagnosticSteps = []diagnosticStep{
 	{